SQUBIT-2 Report Summary

Current-controlled coupling of charge-phase qubits

The Chalmers theory group has investigated the design and functionality of a network of loop-shaped charge qubits with switchable nearest-neighbour coupling. The qubit coupling is achieved by placing large Josephson junctions (JJs) at the intersections of the qubit loops and selectively applying bias currents. The network is scalable and makes it possible to perform a universal set of quantum gates. The coupling scheme allows gate operation at the charge degeneracy point of each qubit, and also applies to charge-phase qubits. Additional JJs included in the qubit loops for qubit readout can also be employed for qubit coupling.

Reported by

CHALMERS UNIVERSITY OF TECHNOLOGY, DEPT MICROTECHNOLOGY AND NANOSCIENCE - MC2